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प्रश्न
Choose the correct answer:
Which of the following gas is used in photosynthesis?
विकल्प
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
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उत्तर
Carbon dioxide
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संबंधित प्रश्न
Give suitable biological reasons for the following statement :
All life on Earth is supported by Photosynthesis.
Fill in the blank:
______ is the process which replenishes the atmospheric oxygen which the animal life consumes in respiration.
Match the terms of column I with those in column II:
| Column I | Column II |
| (i) Stomata closed | (a) decomposers |
| (ii) Autotrophs | (b) light reaction |
| (iii) By-products of photosynthesis | (c) animals |
| (iv) Photolysis | (d) during night |
| (v) Bacteria and fungi | (e) green plants |
| ( f) oxygen |
Are the following statement true or false? Give reason in support of your answer.
The starting point of carbon cycle is the release of carbon dioxide by animals during respiration.
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Give some adaptations in green leaf photosynthesis.
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The raw materials for photosynthesis include water and CO2.
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Photosynthesis can also occur n artificial light such as that of a 100-watt electric lamp.
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- What are X and Y?
- Green plants are autotrophic in their mode of nutrition. Why?
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- Which aspect of photosynthesis is being tested in the above diagram?
- Why was the plant kept in the dark for 24 hours?
- After the starch test, what will be the colour of the yellow and green parts of the leaf? Give reasons to support your answer.
